1. Department of Geriatric Endocrinology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
2. Department of Medicine Cardiology Division, University of Maryland School of Medicine, Baltimore, Maryland, USA
3. Department of Bile Pancreatic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, China
4. Department of Occupational and Environmental Health, School of Public Health, Nantong University, Nantong, China
5. Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA